rbaggers

Checked rubbers tonight, they are ok as are the sync tubes off them. The new pump comes on as it should when the ignition goes on and when trying to start it. Carbs getting fuel.... it's a mystery yet probably something really simple

Hi there, Well, bought the bike off my mate, nice nick, but has been standing in his shed for 10 years, last ran 6 years ago i understand.. Have put a new Fuel pump in as the first one was knackered, cleaned out carbs, New battery and plugs but.... When I try to start it, mostly it starts, splutters a bit then dies, won't idle and wont let me rev it, thats with the choke on full. Also the tacho needle goes a bit haywire when the ignition is on. Occasionally I can get it revving, but need to keep it quite high to stop it stalling ad in any case this is once in a blue moon. My brother had better luck by partially covering the air intake, so starving it of air. Seemed to start much more easily. SO thought the choke may be the problem, but it appears fine. I have heard that The Tacho going wrong is an indication of a defective CDi unit, but don't want to go buying one of those if it is something else. I also thought about messing with the air mixture screws, in case it was running rich, but i don't know the factory settings and can't see why they waould be a problem if it aint been messed with in years. Any help/advice would be very much intereste.. its a long while since I messed around wit bikes.. Cheers

Help please, I think the Fuel pump on my bike is knackered, its been stood for a while and I had trouble starting it, eventually when I filled the tank right up it started on full choke, but was rough, would not idle and stalled when the choke was taken back. I could not hear any Noise from the tank when the ignition went on. I have removed the fuel pump and connected the pump unit directly to the battery (black to neutral and blue to live) and there is nothing. I guess from reading a number of the posts on here that the fuel pump is broken. Its the internal type. I have another on the way from ebay, but that one is also faulty, although it is described as having a wireing fault and works when connected directly to a battery. The plan is to swap the motor units in the whole assembly to hopefully get a working unit. Firstly i would like to ask, am I checking the pump correctly, what noise should i be listening for? and secondly, should my attempt to repair the existing unit fail, is it possible to modify the unit to take an external pump, as they seem much more common to get hold of. If i do do this can the pump go the carb side of the automatic fuel tap?? Indeed has anyone done this mod.. Cheers, Rick